- а) \(x- 1\frac{5}{7} = 2\frac{1}{7}\)
\(x = 2\frac{1}{7} + 1\frac{5}{7}\)
\(x = 3\frac{6}{7}\)
- б) \((12\frac{5}{13} + y) - 9\frac{9}{13} = 7\frac{7}{13}\)
\(12\frac{5}{13} + y = 7\frac{7}{13} + 9\frac{9}{13}\)
\(12\frac{5}{13} + y = 16\frac{16}{13}\)
\(12\frac{5}{13} + y = 17\frac{3}{13}\)
\(y = 17\frac{3}{13} - 12\frac{5}{13}\)
\(y = 16\frac{16}{13} - 12\frac{5}{13}\)
\(y = 4\frac{11}{13}\)
Ответ: а) \(x = 3\frac{6}{7}\); б) \(y = 4\frac{11}{13}\)